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Effect of stunning current on downgrading in turkeys
1Agricultural and Food Research Council, Institute of Food Research, Langford, Bristol, England.
British Poultry Science
|December 1, 1989
Summary
Electrical stunning of turkeys with 150 mA per bird is recommended to minimize carcase quality defects. Higher currents, particularly 250 mA, increased breast muscle hemorrhaging, impacting meat quality.
Area of Science:
- Animal Science
- Poultry Science
- Food Science
Background:
- Electrical stunning is a critical step in poultry processing.
- Optimizing stunning parameters is essential for maintaining carcase quality and minimizing defects.
Purpose of the Study:
- To investigate the impact of varying electrical stunning currents on carcase quality defects in turkeys.
- To determine the optimal current level for minimizing defects such as hemorrhaging and bone fractures.
Main Methods:
- Turkeys were subjected to electrical stunning at three different current levels: 75 mA, 150 mA, and 250 mA.
- Carcase quality defects, including skin and muscle hemorrhaging, bone fractures, and vein engorgement, were systematically assessed.
Main Results:
- Ventricular fibrillation incidence increased with current, reaching 97% at 150 mA and 100% at 250 mA.
- Breast muscle hemorrhaging was significantly affected by stunning current, being most severe at 250 mA.
- No significant effect of stunning current was observed on broken bones or vein engorgement.
Conclusions:
- A stunning current of 150 mA per bird is recommended for turkeys to reduce carcase quality defects.
- Higher currents, such as 250 mA, exacerbate breast muscle hemorrhaging, negatively impacting meat quality.